Renewable face hammer



May 30, 1967 D. E. SMALL 3,322,172

RENEWABLE FACE HAMMER Filed May 24, 1965 3,322,172 Patented May 30, 19673,322,172 RENEWABLE FA-CE HAMMER Donald E. Small, 522 W. Ave. J-9,Lancaster, Calif. 93534 Filed May 24, 1965, Ser. No. 458,309 1 Claim.(Cl. 145-36) This invention relates to hammers and while it is primarilyconcerned with hand hammers having a head and handle, it is alsoapplicable to other percussive tools such as, for example, presses andthe like which may not be equipped with shafts and/or handles. Theexpression hammer is therefore used herein in a general sense to includeall kinds of percussive tools.

My invention is primarily concerned with hammers which have a renewablestriking face portion being made from soft metallicssuch as, lead,brass, copper and various compositions of these materials.

One of the objects of the present invention is to provide improvement insuch hammers whereby the possibility of a renewable striking facebecoming loosened during working will be eliminated.

According to the present invention, I provide a hammer of the kindherein before referred to, a head portion consisting of a relativelyhard material (e.g. a metal such as steel) and one or more renewableface portions of a soft nonferrous metal, each face portion having anaxially projecting hollow stern which is an integral part of the faceportion. In the sockets of the hammer head there is provided a conicsection or angular boss which when engaged with the extended hollow stemof the face portion and pressure is applied by a vise or press, thehollow stem will fiare out filling the circular recess in the inner wallof the hammer head socket. When it is thus seated, the shoulder of thestriking face portion will seat on th face portion of the hammer head,providing a positive locking means, as the flared portion is larger thanthe entrance portion of the hammer head socket.

A further aspect of the present invention is, I have provided aplurality of dividers located at the base of the hammer head socket. Themain object of these dividers is to upset the flared part of the hollowstern of the face portion which is seated in the circular recess of thehammer head so that when hammer head is fixed in a vise the worn faceportion may easily be extracted by turning it in either direction.

Certain embodiments of the invention are described herein after, by wayof example, and are illustrated in the accompanying drawings wherein:

FIGURE I is a view of a hammer head with two striking faces which hereinafter will be referred to as renewable tips or tip, one being shownremoved.

FIGURE II is a view of a renewable tip with a striking face, this viewis to clearly show the notch in the projected hollow stem which is anintegral part of the renewable tip. There is a plurality of notchesaround the periphery of the end of the hollow stem which, when incontact with socket, are in alignment with the plurality of dividers inthe hammer head socket.

FIGURE III is a fragmentary section of the hammer head showingconstruction of the socket.

FIGURE IV shows cutaway section of renew-able tip.

FIGURE V is a cutaway section of the hammer head socket.

FIGURE VI is a cutaway section of a renewabl tip partially engaged inthe hammer head socket.

Referring to the accompanying drawings FIG. I illustrates the head of ahammer and it will be seen that it comprises a head portion 17 made of asuitable steel and provided with an opening 22 extending there throughin which is fixed the end of the handle or shaft and each end of thehammer head portion 17 is provided with a renewable tip 11, each tip 11comprising a striking face 10 and axially projected hollow stem 12 withnotch 13, hollow stem 12 is of reduced diameter which provides ashoulder 14 this shoulder 14 being seen more clearly in FIG. II and itsfunction and purpose being referred to more particularly herein after.The notch 13 on hollow stem 12 is in plurality and is provided tofacilitate easy extraction of worn tip, a further object of notch 13 isto prevent any possibility of radial movement of tip 11 when striking atan angle.

As shown more clearly in FIG. III the ends of hammer head 17 areprovided with a circular recess or socket 19 surrounding an angular bossor conic section 16 of the recess or socket 19, recess or socket 19 isdimensioned to receive the stem 12 of tip 11 also shoulder 14 of tip 11when seated rests on face 15 of hammer head 17. The wall of socket 19 isextended straight to the angular boss or conic section 16 thence turningto an abrupt angle outward to the base of the angular boss 011 conicsection 16 where they intersect as shown on cutaway section FIG. V andFIG. VI.

FIG. III is a fragmentary section of hammer head 17 showing constructionof inner wall of recess or socket 19 angular boss or conic sec-tion 16and divider 18. When shoulder 14 of tip 11 is seated on face 15 ofhammer head 17 the notch 13 will be in mesh with divider 18.

FIG. IV is a cutaway section of renewable tip 11. When hollow stem 12 oftip 11 is placed by hand into the straight wall portion of socket 19,FIG. V, hollow stem 12 will be free to turn in socket 19 to locate notch13 relative to divider 18 in socket 19 as shown more clearly in FIG. VI.As will be noted hollow stem 12 of tip 11 will rest on angular portionof conic section 16 with notch 13 in alignment with divider 18 in hammerhead socket and when hammer head 17 with inserted tip 11 is installed ina vise or press stem 12 will travel down the slope of conic section 16until seated at the base of socket 19 thus constituting a true lock and/or interlocking means of tip 11 to hammer head 17. Due to completeabsence of voids or cavities in socket 19 when hollow stem 12 is firmlyseated at the base of socket 19 and shoulder 14- is resting firmly onface 15 of hammer head 17, seat 20 of hollow stem 12, FIG. 11 and FIG.III, rests firmly on face 21 of conic section 16.

I am aware that prior patents show hammers having soft metal faces ortips; also that prior patents show and describe hammers having a socketat each end into which metal tips are secured, in one case by frictionalone and in another by a rivet or screw passing through the walls ofthe socket setting in the shank of the tip. Another patent shows anddescribes a hammer with sockets having a clove tailed slot through eachend into which tips of various forms having dove tailed shanks or place,and made fast r by rivets or screws which pass through the walls of thedove tailed slot and into the dove tailed shank of the tip, and manyother forms of sockets in the hammer head with various means of securingrenewable soft tips. All of said prior art is hereby disclaimed.

I believe my invention to be new and unique in that it is simple inconstruction and when the tip is pressed into the socket, the hollowstem of the tip flares to conform with the configuration of the socketthus there is no radial and/or angular forces to unseat or loosen thetip within the hammer head socket while the hammer is in use. The onlymeans of loosening the tip from the hammer head socket is by placinghammer head in a vise and turning the worn tip in either direction witha pipe wrench. When thus forcing tip either to the right or the left, asmentioned above, the divider or dividers in the base of the socket willupset the thin edge of the hollow stem of the tip, re-

tracting flared material to a semi-normal position so that worn tip iseasily extracted from the hammer head. This hammer head socket and faceand the renewable tip including shoulder and hollow stem may be used inmany forms without departing from the scope of this invention as long asthey are used as a locking means herein described. I

What I claim is:

A hammer comprising a head portion of relatively hard metal and arenewable striking tip of relatively soft metal and disposed at each endof the head, said head having a socket extending axially inward fromeach end, each socket being cylindrical and having an annular channel inthe inner-most portion thereof extending inward of a central face, saidchannel being of V-shaped configuration with the apex thereof being atthe innermost portion, said channel extending radially outward at anangle to the longitudinal axis of said head, a plurality of dividers atthe base of said channel having surfaces converging in the direction ofsaid ends, said renewable tip having a stem defined by a central recesscircumscribed by a projecting flange terminating in an annular edge,said flange having -a plurality of V-shaped notches which cooperate withsaid dividers to first preclude rotation of said tip when said stem isforcibly inserted in said socket, with said notches and dividers inalignment, to cause said stem to expand into locking engagement withsaid channel, and second to assist in removal of said tip by cammingaction of the surfaces of said notches and dividers.

References Cited UNITED STATES PATENTS 1,493,055 5/1924 Swangren 145361,543,457 6/1925 Swangren 14536 2,008,352 7/1935 Fegley et a1.

FOREIGN PATENTS 639,707 7/1950 Great Britain.

2 WILLIAM FELDMAN, Primary Examiner.

R. V. PARKER, Assistant Examiner.

